The flux o in a 18 KW, 120 V, Duplex Lap-Wound DC machine has been set to induce rated voltage at a speed of 1500 RPM. Find the product Ko, and find the induced torque in this machine at no load. Select one: a. Product = 0.764, and Induced Torque = 114.6 N.m O b. None Oc. Product = 0.764, and Induced Torque = 0 N.m O d. Not enough information is given to find the torque WEXT

The flux o in a 18 KW, 120 V, Duplex Lap-Wound DC machine has been set to induce rated voltage at a speed of 1500 RPM. Find the product Ko, and find the induced torque in this machine at no load. Select one: a. Product = 0.764, and Induced Torque = 114.6 N.m O b. None Oc. Product = 0.764, and Induced Torque = 0 N.m O d. Not enough information is given to find the torque WEXT

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Similar questions

A 220 V permanent magnets DC motor has an armature resistance of 0.5 0. If the full load armature current is 20 A, find the induced e.m.f.. Select one Ⓒa. 210 V b. 230 V c. Not on the list d. 240 V O e. 220 V
At loaded condition, the effect of armature reaction is more in DC machines. Select one: O True False
Electrical machines
f the angular speed of a rotating machine is 188.5 rad/sec, The speed in rpm is ........... a. 1000 b. 900 c. 1800 d. 1250
Stray losses represent: O A. Resistive losses in the windings of the machine O B. Losses due to friction of the moving parts O C. Losses due to magnetization and demagnetization of the core O D. Windage losses O E. None of the other choices are correct
Q3. B. what are the features of Lap winding of DC machine?
Q3. Write if the shown statements are TRUE or FALSE. 1- In DC machine the induced e.m.f is proportional with flux only. 2- The Ta/l a graph of a d.c. series motor is a straight line throughout. 3- In a DC motor the direction of the shaft rotation can be change by changing the polarity of the power supply. 4-The critical resistance is less than armature resistance in shunt generator. 5-As the load is increased, the speed of a d.c. shunt motor increases slightly.
The torque in AC machines depends on Select one: a. The strength of the rotor magnetic field b.The strength of the external magnetic field c.The sin of the angle between the rotor magnetic field and the external magnetic field d.A constant representing the construction of the machine e.All of above Clear my choice
A 4 pole armature of a DC machine has 175 conductors and a flux per pole of 0.1 wb. Find the EMF generated when running at 600 rpm, when the armature is Lap wound.
This course EHide blom Clear my choice An eight-pole, 24 KW, 124 V, DC machine has a duplex LAP-wound armature which has 72 coils with 6 turns per coil. Its rated speed is 3000 RPM. Assume no dead zone Find the constant K and the flux per pole to produce 80 Volts at no-load conditions Select one: a. None Ob. K = 68.86 and flux = 3.33 mWb/pole Oc.K = 68.755 and flux = 3.7 mWb / pole O d. K = 95.5 and flux = 3.7 mWb / pole A peries DC motor has a series-field windino of 25 turns per pole. Its armature resistance in 0,1 2. and its
(B)-Explain by drawing the change in the direction of current flows through coils at the ideal case of commutation by considering coil B which is the coil under commutation as shown in the figure below. B C 5A SA 5A Armature winding 10 A Commutator 10 A Brush